(1)  
Location Zone
 731 Main Landing Gear (Left)
 741 Main Landing Gear (Right)

 D.  
Prepare for Removal

 S 494-002
 (1)  
Make sure the downlocks for the nose and main landing gear are installed (AMM 32-00-20/201).

 S 864-003

 (2)  
Remove the pressure from the left hydraulic system and the hydraulic reservoir (AMM 29-11-00/201).

 E.  
Procedure to Remove the Main Gear Downlock Actuator

 (1)
Disconnect the hydraulic lines from the actuator clevis pin.

 (2)
Put a plug in the hydraulic lines and the actuator fittings.

 S 034-006

 (3)  
Remove the bolt (1) to disconnect the rod end of the actuator from the upper downlock link (Fig. 401, View A-A).

 S 034-004
 S 434-005
 

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A

757 MAINTENANCE MANUAL 
ACTUATOR DOWNLOCK ASEE 
B 
DOWNLOCK ASSEMBLY  C 
SHOCK STRUT  PIN C 8. CLEVIS  B 
INBD  A  FWD 
A  DOWNLOCK ACTUATOR A 
1. BOLT 
DOWNLOCK UPPER LINK  ACTUATOR 2. DOWNLOCK 
7. PIN  3. WASHER 4. NUT 
A-A 

Main Gear Downlock Actuator Installation
Figure 401 (Sheet 1)

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A

757
MAINTENANCE MANUAL

ANTIROTATION

ASSEMBLY
B-B

10. PACKING (2 LOCATIONS) 12. REDUCER

11. UNION
C-C
Main Gear Downlock Actuator Installation
Figure 401 (Sheet 2)

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757 MAINTENANCE MANUAL
 S 034-025
 (4)  
Remove the pin (9), nut (5), and washer (6) from the clevis pin (8) at the head end of the actuator (Fig. 401, View B-B).

 S 034-022

 (5)  
Remove the bolts to disconnect the antirotation bracket from the downlock spindle (View B-B).

 S 034-007

 (6)  
Remove the actuator clevis pin assembly (8) to disconnect the head end of the actuator from the downlock spindle (Fig. 401, View B-B).

 S 024-008

 (7)  
Remove the downlock actuator (2).

 S 034-009

 (8)  
If the downlock actuator that will be installed does not have hydraulic fittings installed in its ports, do the steps that follow:

 (a)  
Remove the union (11) and the reducer (12) from the actuator which was removed from the airplane.

 (b)  
Identify the union (11) and reducer (12) with a label to make sure they are installed in the correct location on the new actuator.

 (c)  
Discard the packing (10).

 TASK 32-32-02-404-010
 3.  Install the Main Gear Downlock Actuator (Fig. 401)_______________________________________
 A. References
 (1)  
AMM 12-12-01/301, Hydraulic Systems

 (2)  
AMM 29-11-00/201, Pressurize/Depressurize Main Hydraulic System

 B.
Consumable Materials

 (1)  
D00153 Hydraulic Fluid - Fire resistant,
 BMS 3-11

 (2)  
D00633 Grease - BMS3-33 (Preferred)

 (3)  
D00013 Grease - MIL-G-23827 (Alternative)

 (4)  
D00054 Lubricant, Hydraulic Systems - MCS-352

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757 MAINTENANCE MANUAL
 C. Parts
 ~.............................................................................. | MM | | IPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT |FIG | ITEM | ................................................................................ | 401 | 1 | Bolt | 32-32-02 | 01 | 50 | | | 2 | Downlock Actuator | | | 65, 67| | | 3 | Washer | | | 55 | | | 4 | Nut | | | 60 | | | 5 | Nut | | | 20 | | | 6 | Washer | | | 15 | | | 7 | Pin | | | 45 | | | 8 | Clevis Pin Assembly | | | 90 | | | 9 | Pin | | | 10 | | | 10 | Packing | | | 80 | | | 11 | Union | | | 70 | | | 12 | Reducer | | | 75 | 2......…........…...................................…...........…....….........1
 D. Access
 (1)  
Location Zone
 731 Main Landing Gear (Left)
 741 Main Landing Gear (Right)

 E.
　
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